使用离子迁移率质谱法分析大气气体和气溶胶物种

IMS-MS迅速被生物分析研究人员接受。对于脂质组学和代谢组学领域，各种异构体有时在生物学活性上显示出很大差异的田间，迅速分离异构化合物的潜力特别感兴趣。

Benefits of IMS-MS

Incorporating an IMS dimension to MS analyses could also be of significant advantage for atmospheric measurements. In that case, scientists are frequently confronted with the challenge that several molecules from organic aerosols cannot be adequately well identified based on MS alone. However, these identifications, particularly for isomeric molecules, are critical for determining chemical mechanisms that inform climate models. IMS-MS instruments could thus significantly enhance the understanding of reactions in the atmosphere.

On the whole, the strong construction, small size, and high IMS resolving power of theTofwerk ims-tofpropose a possibility to bring the benefits of IMS-MS to the demanding research environments that are characteristic of atmospheric research. Such potential is presented in a current paper in Atmospheric Measurement Techniques by Krechmer et al.

Tofwerk IMS-TOF的应用

在2013年南部氧化剂和气雾剂研究（SOAS）运动中，使用TOFWERK IMS-TOF同时表征了环境空气中有机物种的分子结构和元素组成。

TheIMS-TOF dataset produced several interesting outcomes, including differentiation of organosulfates obtained from isomers of isoprene epoxydiols (IEPOX). Fragmentation of precursor ions by collisionally induced dissociation (CID) was used to validate MS peak assignments, explain structures of oligomers, and prove the presence of the organosulfate functional group.

气体和气溶胶IMS-TOF数据集提供了重要的化学信息，不能仅靠高分辨率质谱。

Top: Aerial view of the SOAS field site in Brent, Alabama taken from a tower that was installed to sample air above the forest canopy. The white trailers in the top half of the photo served as the laboratories. Bottom: A look inside one of the trailer laboratories. Ambient outdoor air was directly sampled through inlets in the windows and walls. Photos compliments of Jimenez Research Group, U of Colorado Atmospheric researchers from around the world brought instrumentation to the SOAS campaign for the measurement of many different types of chemical compounds. Data were shared and inter-compared in order to understand the complex chemistry of the atmosphere in this region, where urban air masses mix with forest emissions. The campaign included long-term measurements (three to five weeks) from multiple ground sites and measurements from research aircraft flying over the region.

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